freebsd man page for trunc

TRUNC(3)						   BSD Library Functions Manual 						  TRUNC(3)

NAME
     trunc, truncf, truncl -- nearest integral value with magnitude less than or equal to |x|

LIBRARY
     Math Library (libm, -lm)

SYNOPSIS
     #include <math.h>

     double
     trunc(double x);

     float
     truncf(float x);

     long double
     truncl(long double x);

DESCRIPTION
     The trunc(), truncf(), and truncl() functions return the nearest integral value with magnitude less than or equal to |x|.	They are equiva-
     lent to rint(), rintf(), and rintl(), respectively, in the FE_TOWARDZERO rounding mode.

SEE ALSO
     ceil(3), fesetround(3), floor(3), math(3), nextafter(3), rint(3), round(3)

STANDARDS
     The trunc(), truncf(), and truncl() functions conform to ISO/IEC 9899:1999 (``ISO C99'').

HISTORY
     These routines first appeared in FreeBSD 5.3.

BSD
								  April 16, 2005							       BSD